A table for a quadratic function is shown. Which of the following statements about the graph of the table are true? I. The graph has a line of symmetry at x=7

II. The graph has a y-intercept at (0,−40)

III. The graph has an x-intercept at (4,0)

IV. The graph has a vertex at (6,8)

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

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answer: 819.89 miles across america

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guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation: